It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles, doing so may greatly improve the overall life of the battery. ^OEM Part Numbers: EB-L1D7IBA / EB-L1D7IBAB / EB-L1D7IBABSTD / EBL1D7IBA ^Battery Capacity: 1850mAh, Voltage: 3.7V ^Original OEM product